Dictionary

half

-adjective

1. Consisting of a moiety, or half (1/2, 50%)
2. Consisting of some indefinite portion resembling a half; approximately a half, whether more or less; partial; imperfect
3. (of a sibling) Having one parent (rather than two) in common
4. (rare, of a relative other than a sibling) Related through one common grandparent or ancestor rather than two

-adverb

1. In two equal parts or to an equal degree; in some part approximating a half; partially; imperfectly

-noun

1. One of two equal parts into which anything may be divided, or considered as divided; — sometimes followed by of; as, a half of an apple.
2. Half of a standard measure; frequently used (UK) for half a pint of beer or cider.
3. (arithmetic, preceded by “a” or a number) The fraction obtained by dividing 1 by 2.
4. (obsolete) part; side; behalf — Wyclif

-verb

1. (transitive, obsolete) To halve.